The Preparing and Characterization of Nanocomposite (PTh/SWCNT) for NO2 Gas Sensing

Abstract

We prepared polythiophene (PTH) with single wall carbon nanotube (SWCNT) nanocomposite thin films for Nitrogen dioxide (NO2) gas sensing applications. Thin films were synthesized via electrochemical polymerization method onto (Indium tin oxide) ITO coated glass substrate of thiophene monomer with magnesium perchlorate and different concentration from SWCNT (0.012 and 0.016) % in the presence130mL of Acetonitrile used. X-ray diffraction (XRD), Field Emission Scanning Electron microscopy (FE-SEM), Atomic Force Microscope (AFM) and Fourier Transform Infrared Spectroscopy (FT-IR) were used to characterized these nanocomposite thin films. The response of these nanocomposite for NO2 gas was evaluated via monitoring the change time in presence 25% NO2 of with electrical resistance at (40, 80,120,160 and 200)°C. We can observe that the PTh/SWCNT films show a higher sensitivity as compare to pure PTH.

Liquid crystal behavior, photoluminescence and gas sensing: A new series of ionic liquid crystal imidazole and benzoimidazole bearing chalcone groups, synthesis and characterization

“…42 Interdigitated aluminum ohmic metal contacts are deposited on the 4i lms by the thermal evaporation technique to fabricate the gas sensor. 43 The experimental setup prepared for the gas sensor testing system is suitable to determine the sensitivity parameter mainly the response time and recovery time of the fabricated 4i gas sensor detector. It consists of a cylindrical stainless-steel test chamber with an effective volume of 2649 cm 3 , and it has an inlet for permitting the tested gas to ow in and an air admittance valve to permit the ow of atmospheric air aer evacuation.…”

“…Interdigitated aluminum ohmic metal contacts are deposited on the 4i films by the thermal evaporation technique to fabricate the gas sensor. 43 …”